[Jo_Jo]

hello everyone.
did anybody use the SLA7062 to drive and control the stepper motor?
i cant understand something
1\what does the SYNC use for?
2\the rated voltage of my motor is 6.6V,but VBB is just from 10V to 44V, what should i do? connect them directly?
3\are the RsA and the RsB same?
4\if i use ATMEGA64 to control it, should i use some appropriate pull-up resistors?

do anybody have sucessful experience?

http://pdf.alldatasheet.com/datashee.../SLA7062M.html

[limbo]

Hi Jo_Jo

1) If you disable the sync input the motors will make a slight hissing noise,
but the performance will be better. So it is best make sync input low.

2) Yes, the supply voltage for the controller can be much higher than the
rated voltage for the motor. The controller output is regulated so your
motor will not be damaged

3) yes

4) The logic inputs in the SLA work between 0 and 5V. If you can run the
ATMEG at 5V you don't need pull ups.

John

[Jo_Jo]

Hi,John. Thank you for your replies.
Well, i can design my circuit.^_^

[Jo_Jo]

i have another question, in the figure of page 11, what does the P-GND and the S-GND mean?

[limbo]

One is Power-ground and the other is Signal-ground. It has to do with noise that occurs on the ground line (especially in the power ground) if you have long wires to the supply. This noise could cause false triggering of the input signals.

If you make a pcb with nice ground plane or thick ground tracks and keep the wiring to the buffer elco short you shouldn't have to worry about it. Just use a single ground.

John

[Jo_Jo]

Thank you, John, i got it, ^_^，but one more question.
in the figure of page 11, i think Q1 is wrong,should it be reverse. i think the direction is from S to G,not from G to S.

[limbo]

I think its correct in the datasheet. It says "to produce zero current in a motor the ref voltage should be pulled above 2V, turning off all drivers"

Q1 is a PMOST, with the Source connected to the pos. suppy and the Drain to the REF node. The Gate-node labeled "disable" is confusing though, as a low (!) signal at the Gate switches on the PMOS and disables the drive. So it should have stated "enable".
On the other hand you probably don't need the disable feature so you might even leave it out.

John

[Jo_Jo]

Thank you very much, John, I appreciate your helping in time

[datasheet]

http://www.datasheet4u.com


http://nl.datasheet4u.com

:boxing:

[Jo_Jo]

hello, datasheet, thank you, but i have got the datasheet of SLA7062.

[datasheet]

http://www.datasheet4u.com/html/S/L/...stems.pdf.html

SLA7060 ~ SLA7062

[datasheet]

http://www.datasheet4u.com/html/S/L/...stems.pdf.html

SLA7060 ~ SLA7062

[datasheet]

hello, datasheet, thank you, but i have got the datasheet of SLA7062.

http://www.datasheet4u.com/html/S/L/...stems.pdf.html

SLA7060 ~ SLA7062

[Jo_Jo]

hi all, im back.
i have new question.i want to select a p-channel mosfet,but what i found is that they all have high voltage,and high current.finally,i choose the 2N6845. did you here that before?could you give me some advices. thankyou

[limbo]

Jo_Jo,

This transistor will work, if you make sure your power supply voltage is 5V. At 3.3V the Gate-source threshold voltage (max 3.5V) might be higher than the drive signal from the microprocessor, so that the transistor will not turn (reliably) on.

Alternatively you could look for a (P-channel enhancement) vertical D-mos Fet, such as the BSS84. These have lower threshold voltage (max 2v).

Anyway, at 5V the 2N6845 will work fine.

John

[Jo_Jo]

thank you John,

[meeeul]

jo jo

did you get the driver board working with SLA7062M ?

I am interested in building one.

thx

[Jo_Jo]

Hi meeeul
It has already worked, but i dont know how to upload a sch, so if you are interested in the driver board, you can give me a email and my msn is '[email protected]'.
and then i will send you the sch.

[shahidmk]

Hi Jo jo,

I had my SLA7062 gathering dust, now I am ready to start looking at building a driver board with them. I am interested in getting a copy of your sch if you can help!!!!!!

[Jo_Jo]

Hi shahidmk,
I dont know how to upload a sch, so if you want to please give me a email, and i will give you the sch by reply your email.
my msn is [email protected]